Side and end tipping loading machines

ABSTRACT

A loading machine consisting of a wheeled chassis and two arms pivoted at their rear ends to the chassis. The arms are so connected to the chassis that they are independently capable of vertical and limited horizontal movement. A bucket is pivotally connected with limited universal movement to the front ends of the arms. The arms can be raised or lowered together hydraulically. Hydraulic jacks which extend between the arms and the bucket when operated separately or to different extents cause the forward end of the appropriate arm to sweep through a curve towards the vertical plane containing the other arm causing the bucket to pivot about the other arm.

United States Patent McGuinness Mar. 28, 1972,

[s41 SIDE AND END TIPPING LOADHNG 3,198,358 8/1965 Gardner "214/768 MACHINES 3,419,171 12/1968 Isaksen ..2l4/768 [72] inventor: Allan;l McGuinnw Johannesburg, Primary Examiner Gera-ld Foflenza Sout A Plea I Assistant Examiner-John Mannix [73] Assignee: Maconomy (Proprietary) Limited, Johan- A orney- Roditi, Schwartz and NiSSen nesburg, South Africa g 221 Filed: Sept. 30, 1969 [571' ABSTRACT A loading machine consisting of a wheeled chassis and two [21] App! 862A arms pivoted at their rear ends to the chassis. The arms are so connected to the chassis that theyare independently capable [30] Foreign Application Priority Data of vertical and limited horizontal movement. A bucket is Sept. 30 1968 South Africa ..68/63ll pivotally connected with limited universal movement to the Jan. 3 1 969 South Africa: ..69/0053 fmm the The arms Ive/raised meted together hydraulically. Hydraulic jacks which extend between 52 us. Cl ..214/768 the m and the bucket when Operated separately or to 5 1 1 Int. Cl. ..E02r 3/84 ferent extents cause the forward end of the pp p arm to [58] Field of Search ..214/768, 80, 42 sweep through a curve towards the vertical plane containing the other arm causing the bucket to pivot about the other arm. 56 R i Cited 1 e mnces 9 Claims, 6 Drawing Figures UNITED STATES PATENTS v v 2,696,924 12/1954 Madsen PATENTEB M28 1972 SHEET 3 [IF 4 1 SIDE AND END TIPPING LOADING MACHINES The present invention relates to loading machines, in particular side dumping loading machines.

In a known type of side dumping loading machine a loading bucket is pivoted centrally to a frame extending transversely to the digging direction which is secured to the ends of two arms pivoted to a vehicle for movement in a vertical plane. The loading bucket pivots in a plane parallel to the frame to unload its contents over one of its sides. 7

It is an object of the invention to provide a loading machine incorporating a novel arrangement for effecting the side tipping of the loading bucket.

A loading machine according to the invention, comprises a wheeled chassis, two arms pivoted with their rearward ends on spaced pivot points on the chassis in such a manner as to allow both vertical reciprocation in a plane vertical to the surface on which the chassis runs and limited sideways movement, a bucket carried by the arms at their forward ends and pivotally connected to each arm in a manner allowing limited universal movement, means for raising and lowering the arms together, and means to cause the end of one arm to sweep through a curve towards the vertical plane containing the other arm thus causing the bucket to pivot about the other arm.

Further according to the invention, the means to cause the end of one arm to sweep through a curve towards the vertical plane containing the other arm comprises a pair of links pivoted to the bucket at points spaced from points of connection of the arms to the bucket and pivoted to the arms, so that each arm, the bucket and one of the links cooperatively define a pair of spared triangles, one of the sides of at least one triangle being adjustable in length, and means to adjust the length of that side.

The present invention is further discussed with reference to the accompanying drawings which illustrate the invention and in which:

FIG. 1 is a side elevation of one embodiment of the loading machine of the invention,

FIG. 2 is a plan view of the loading machine of FIG. 1,

FIG. 3 is an enlarged section through the support frame for the arms ofthe loading machine ofFlG. 1,

FIG. 4 is an enlarged fragmentary section through the rear end of an arm ofthe loading machine ofFIG. 1,

FIG. 5 is a side elevation of another embodiment of the loading machine of the invention, and

FIG. 6 is a plan view of the loading machine of FIG. 5.

Referring to FIGS. 1 to 4, the loading machine comprises a wheeled vehicle 10, two arms 12 pivotally mounted to the front end of the vehicle and a loading bucket 14 carried at the forward ends of the arms 12.

The arms 12, are for a portion of their length normally supported on lateral flanges 16 of a supporting frame 18 which is pivotally mounted on a rod 20 journalled through two trunnions 21 on the vehicle 10. An hydraulic jack 22 between the frame 18 and the vehicle chassis serves to pivot the frame 18 in a vertical direction.

At their rear ends the arms 12 are pivotally connected to the vehicle by means of links 24 which are journalled on the rod 20 by means of spherical bearings 26. The arms 12 are rotatably mounted on the links 24 in the manner illustrated in FIG. 4.

The arms 12 are also pivoted to the support frame by means of connectors 28. The connectors 28 rotatably journal the arms 12 in spherical bearings 30 at one end and are spherically pivoted at the other end to the support frame 18 as at 31.

Cut-outs 32 are provided in the lateral flanges 16 to accommodate the connectors 28. The arms 12 are thus able to rest on the flanges 16.

The forward ends of the arms 12 are connected by spherical bearings 34 to the rear end of the bucket 14.

Two hydraulic jacks 36 which extend between the arms 12 and the upper rear end of the bucket 14 and have their ends journalled in spherical bearings 38 and 39, complete the assembly.

In use, operation of the jack 22 pivots the support frame 18 vertically to lower or raise the arms 12 and hence the loading bucket 14. Simultaneous operation of the jacks 36 produces end tipping while separate operation of these jacks causes the forward end of one of the arms 12 to move simultaneously both horizontally and vertically with respect to the other arm to tilt the bucket 14 and unload its contents over one of the sides of the bucket, the appropriate connector 28 pivoting about its pivot point on the support frame 18, to permit this movement of the arm 12.

Of course during this movement, the arms 12 will also rotate to some extent within the connector 28.

In the embodiment of FIGS. 5 and 6, there is shown a tractor 40 which has been modified to provide a loader in accordance with the invention. The support frame 18 is replaced by a bridle 42 and the rear ends of the bridle 42 and the arms 12 are pivotally mounted on a suitably robust portion of the rear of the tractor such as the rear axle housing 44 of the trac tor. In this connection it should be noted that the arms 12 are mounted on the rear axle housing 44 by means of spherical bearings 46.

Two jacks 48, one to either side of the tractor body, serve to vertically pivot the bridle 42. As will be seen from FIG. 5 the arms 12 which are outwardly splayed are connected to the upper rear end of the bucket 14 through links 24, and the jacks 36 are located on the underside of the arms 12.

In place of the stabilizers 28 a locating rod 43 maintains the bucket 14 in a suitable location, the arms 12 moving laterally on the pads 16 while side tipping takes place.

In other respects, the structure and operation of the embodiment of FIGS. 5 and 6 is identical to that of the embodiment of FIGS. 1 to 4.

The spherical bearings which are used on the loading machine are conventional and therefore do not require further description. A spherical bearing which has been found particularly suitable is the S.K.F. High Capacity Spherical plain bearing.

I claim:

1. A loading machine comprising, a wheeled chassis, two arms each including forward and rearward ends respectively, said arms being pivoted with their rearward ends on spaced pivot points on the chassis in such a manner as to allow both verticle displacement in a plane vertical to the surface on which the chassis runs and limited sideways movement, a bucket carried by the arms at their forward ends and pivotally connected to each arm in a manner allowing limited universal movement, means for raising and lowering the arms together, and means for displacing the forward end of one arm to sweep through a curve towards the vertical plane containing the other arm thus causing the bucket to pivot about the other arm, the displacing means comprising a pair of links pivoted to the bucket at points spaced from points of connection of the arms to the bucket and pivoted to the arms, so that each arm, the bucket and one of the links co-operatively define a triangle, one of the sides of at least one triangle being adjustable in length, and means to adjust the length of that side.

2. A loading machine as claimed in claim 1 in which the links are hydraulic jacks.

3. A loading machine as claimed in claim 2 in which the connection of the links to the arms and the bucket, is by means of spherical bearings.

4. A loading machine as claimed in claim 2 including means for pivoting the bucket about an axis substantially transverse to the arms.

5. A loading machine as claimed in claim 4 in which the means for pivoting the bucket about an axis substantially transverse to the arms comprises the hydraulic jacks when operated simultaneously.

6. A loading machine as claimed in claim 1 including a support frame and in which the arms are adapted to be supported for a portion of their lengths on the support frame the latter being pivoted to the chassis for movement in the vertical plane, and means for pivoting the support frame in the vertical form of a bridle with its ends connected to the tractor and being adapted to pass around the body of the tractor.

9. A loading machine as claimed in claim 8 in which the arms are splayed outwardly from the rear ends to their forward ends. 

1. A loading machine comprising, a wheeled chassis, two arms each including forward and rearward ends respectively, said arms being pivoted with their rearward ends on spaced pivot points on the chassis in such a manner as to allow both verticle displacement in a plane vertical to the surface on which the chassis runs and limited sideways movement, a bucket carried by the arms at their forward ends and pivotally connected to each arm in a manner allowing limited universal movement, means for raising and lowering the arms together, and means for displacing the forward end of one arm to sweep through a curve towards the vertical plane containing the other arm thus causing the bucket to pivot about the other arm, the displacing means comprising a pair of links pivoted to the bucket at points spaced from poinTs of connection of the arms to the bucket and pivoted to the arms, so that each arm, the bucket and one of the links co-operatively define a triangle, one of the sides of at least one triangle being adjustable in length, and means to adjust the length of that side.
 2. A loading machine as claimed in claim 1 in which the links are hydraulic jacks.
 3. A loading machine as claimed in claim 2 in which the connection of the links to the arms and the bucket, is by means of spherical bearings.
 4. A loading machine as claimed in claim 2 including means for pivoting the bucket about an axis substantially transverse to the arms.
 5. A loading machine as claimed in claim 4 in which the means for pivoting the bucket about an axis substantially transverse to the arms comprises the hydraulic jacks when operated simultaneously.
 6. A loading machine as claimed in claim 1 including a support frame and in which the arms are adapted to be supported for a portion of their lengths on the support frame the latter being pivoted to the chassis for movement in the vertical plane, and means for pivoting the support frame in the vertical plane, the arms being pivotally connected intermediate their lengths to the support frame.
 7. A loading machine as claimed in claim 1 in which the connection of the arms to the chassis and to the bucket, is by means of spherical bearings.
 8. A loading machine as claimed in claim 1 in which the wheeled chassis is a tractor, and the support frame is in the form of a bridle with its ends connected to the tractor and being adapted to pass around the body of the tractor.
 9. A loading machine as claimed in claim 8 in which the arms are splayed outwardly from the rear ends to their forward ends. 